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Page 1910, results 47726 - 47750

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Key to acanthocephala reported in waterfowl
Malcolm E. McDonald
1988, Resource Publication 173
This is the third part of a continuing series on helminths reported in waterfowl (McDonald 1974, 1981). Coots and moorhens (in Family Rallidae, Order Gruiformes) are included with the Anatidae of Anseriformes. The goal of these studies i complete coverage of waterfowl helminths of the world, although the original incentive-inadequate...
Sedimentary biomarker and isotopic indicators of the paleoclimatic history of the Walker Lake basin, western Nevada
P.A. Meyers, L. V. Benson
1988, Organic Geochemistry (13) 807-813
Walker Lake, a terminal saline lake in western Nevada, has experienced major fluctuations in its water level due to changes in the regional climate during Quaternary times. As part of a paleo-climatological study of western Nevada, we have investigated organic matter δ13C and C/N values and lipid biomarker contents of sediments deposited...
Chemistry and geothermometry of brine produced from the Salton Sea Scientific drill hole, Imperial Valley, California
J. M. Thompson, R.O. Fournier
1988, Journal of Geophysical Research Solid Earth (93) 13165-13173
The December 29–30, 1985, flow test of the State 2–14 well, also known as the Salton Sea Scientific drill hole, produced fluid from a depth of 1865–1877 m at a reservoir temperature of 305° ± 5°C. Another flow test at a depth of 3170 m produced brine contaminated by drilling...
General two‐point method for Determining velocity in open channel
John F. Walker
1988, Journal of Hydraulic Engineering (114) 801-805
The generally accepted procedure is to average velocity measurements at 0. 2D and 0. 8D, measured vertically from the water surface,or alternatively to measure velocity at a position equal to 0. 6D, where D is the total depth of flow. In some situations, one may wish to measure at depths...
Using exogenous variables in testing for monotonic trends in hydrologic time series
William M. Alley
1988, Water Resources Research (24) 1955-1961
One approach that has been used in performing a nonparametric test for monotonic trend in a hydrologic time series consists of a two-stage analysis. First, a regression equation is estimated for the variable being tested as a function of an exogenous variable. A nonparametric trend test such as...
Origin and influence of coal mine drainage on streams of the United States
J. D. Powell
1988, Environmental Geology and Water Sciences (11) 141-152
Degradation of water quality related to oxidation of iron disulfide minerals associated with coal is a naturally occurring process that has been observed since the late seventeenth century, many years before commencement of commercial coal mining in the United States. Disturbing coal strata during mining operations accelerates this natural deterioration...
Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California
Roger Fujii, S. J. Deverel, D. B. Hatfield
1988, Soil Science Society of America Journal (52) 1274-1283
Soils from three agricultural fields in the Panoche Creek alluvial fan area in the western San Joaquin Valley, California, were analyzed for soluble, adsorbed, and total concentrations of selenium (Se) to assess the distribution and forms of Se in relation to the leaching of Se from soils. This assessment is...
Wetland Boundary Determination in the Great Dismal Swamp Using Weighted Averages
Virginia Carter, Mary Keith Garrett, Patricia T. Gammon
1988, Water Resources Bulletin (24) 297-306
A weighted average method was used to analyze transition zone vegetation in the Great Dismal Swamp to determine if a more uniform determination of wetland boundaries can be made nationwide. The method was applied to vegetation data collected on four transects and three vertical layers across the wetland-to-upland transition zone...
Downslope Eulerian mean flow associated with high-frequency current fluctuations observed on the outer continental shelf and upper slope along the northeastern United States continental margin: Implications for sediment transport
B. Butman
1988, Continental Shelf Research (8) 811-840
Eulerian current measurements made 5-7 m above bottom at six stations along the United States east coast continental margin show a net downslope flow of 1-5 cm s-1. Although the scalar current speed decreases with water depth and toward the bottom, fluctuations in the cross-isobath flow were stronger and increasingly...
Coarse-sediment bands on the inner shelf of southern Monterey Bay, California
R. E. Hunter, J.R. Dingler, R. J. Anima, B. M. Richmond
1988, Marine Geology (80) 81-98
Bands of coarse sand that trend parallel to the shore, unlike the approximately shore-normal bands found in many inner shelf areas, occur in southern Monterey Bay at water depths of 10–20 m, less than 1 km from the shore. The bands are 20–100 m wide and alternate with bands...
The hydrothermal system at Newberry Volcano, Oregon
E.A. Sammel, S. E. Ingebritsen, Robert H. Mariner
1988, Journal of Geophysical Research Solid Earth (93) 10149-10162
Results of recent geological and geophysical studies at Newberry Volcano have been incorporated into conceptual and numerical models of a magma-based hydrothermal system. Numerical simulations begin with emplacement of a small magma body, the presumed source of silicic eruptions at Newberry that began about 10,000 B.P., into a thermal regime...
Effects of Precipitation and Land Use on Storm Runoff
R. G. Brown
1988, Water Resources Bulletin (24) 421-426
Storm-runoff quantity and quality were studied in three watersheds located near St. Paul in Ramsey County, Minnesota, from April 15 through September 15 of 1984, 1985, and 1986 to qualitatively determine the effects of precipitation and selected land uses on storm runoff. In respect to precipitation effects, differences in storm-runoff...
Stable isotope geochemistry of sphalerite and other mineral matter in coal beds of the Illinois and Forest City basins
J. F. Whelan, J.C. Cobb, R. O. Rye
1988, Economic Geology (83) 990-1007
Cleat and clastic dikes of Middle Pennsylvanian-age coal beds of the Illinois and Forest City basins of Illinois, Iowa, Missouri, and Kansas locally contain appreciable amounts of sphalerite within a kaolinite-pyrite-sphalerite (+ or - pyrite)-calcite paragenetic sequence. The sphalerite and associated minerals are of interest as a partial record of...
Identification, movement, growth, mortality, and exploitation of walleye stocks in Lake St. Clair and the western basin of Lake Erie
Robert C. Haas, Mary C. Fabrizio, Thomas N. Todd
1988, Fisheries Research Report 1954
The harvest of walleye by sport and commercial fisheries in lakes St. Clair and Erie is under a cooperative management program involving several states and two countries. In this report we present the results of a long-term tag-recapture study as well as corroborative evidence of stock discreteness fromstudies of...
Avian morbidity and mortality from botulism, aspergillosis, and salmonellosis at Jamaica Bay Wildlife Refuge, New York, USA
C. J. Brand, R. M. Windingstad, Lynne M. Siegfried, R. M. Duncan, R.M. Cook
1988, Colonial Waterbirds (11) 284-292
During the summers of 1981 and 1982, studies were conducted at Jamaica Bay Wildlife Refuge, Long Island, New York, to determine whether annual water-level drawdowns used to create shorebird habitat also led to the occurrence of avian botulism (Clostridium botulinum type C). Low levels of morbidity and mortality from avian...
American wild celery (Vallisneria americana): Ecological considerations for restoration
C. E. Korschgen, W. L. Green
1988, Technical Report 19
The success of vegetation management programs for waterfowl is dependent on knowing the physical and physiological requirements of target species. Lakes and riverine impoundments that contain an abundance of the American wildcelery (Vallisneria americana ) have traditionally been favored by canvasbacks (Aythya valisineria ) and other waterfowl...
Selenium in the Kendrick recalamation project, Wyoming
David A. Peterson
1988, Conference Paper
Elevated concentrations of selenium in water, bottom sediment, and biota were noted during a reconnaissance investigation of the Kendrick Reclamation Project in central Wyoming. Dissolved-selenium concentrations in 11 of 24 samples of surface or ground water exceeded the national drinking-water standard of 10 micrograms per liter. Bottom-sediment samples contained concentrations...
Determining the distribution of hydraulic conductivity in a fractured limestone aquifer by simultaneous injection and geophysical logging
Roger H. Morin, A.E. Hess, Frederick L. Paillet
1988, Ground Water (26) 587-595
A field technique for assessing the vertical distribution of hydraulic conductivity in an aquifer was applied to a fractured carbonate formation in southeastern Nevada. The technique combines the simultaneous use of fluid injection and geophysical logging to measure in situ vertical distributions of fluid velocity and hydraulic head down the...
Oxygen isotope variations in granulite-grade iron formations: constraints on oxygen diffusion and retrograde isotopic exchange
Z.D. Sharp, J. R. O’Neil, E.J. Essene
1988, Contributions to Mineralogy and Petrology (98) 490-501
The oxygen isotope ratios of various minerals were measured in a granulite-grade iron formation in the Wind River Range, Wyoming. Estimates of temperature and pressure for the terrane using well calibrated geothermometers and geobarometers are 730??50?? C and 5.5??0.5 kbar. The mineral constraints on fluid compositions in the iron formation...
Developing a state water plan: Ground-water conditions in Utah, spring of 1988
Gail E. Cordy, G. J. Smith, D. Michael Roark, Patrick M. Lambert, John A. Yarbrough, Carole B. Burden, R. B. Garrett, D. C. Emett, Susan A. Thiros, G. W. Sandberg, R. W Puchta
1988, Cooperative Investigations Report 28
This is the twenty-fifth in a series of annual reports that describe ground-water conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties to keep abreast of changing ground-water conditions.This report, like the...
Off-platform Silurian sequences in the Ambler River quadrangle: A section in Geologic studies in Alaska by the U.S. Geological Survey during 1987
Julie A. Dumoulin, Anita G. Harris
1988, Circular 1016
Lithofacies changes in coeval upper Paleozoic rocks have been used to unravel the tectonic history of northern Alaska (for example, Mayfield and others, 1983). Conodont biostratigraphy and detailed petrologic studies are now revealing facies differences in lower Paleozoic rocks that can also be used to constrain their tectono-sedimentary framework (Dumoulin...